Gucci 18k gold ring, 3 to 5g. GUCCI Gucci boutique jewelry series rings include diamond rings, platinum rings, gold rings, classic double G rings, gem ring, mirror rings and other products. The weight of 18K gold ring is greatly influenced by its size and style. Take the most common ordinary aperture ring as an example. Most of the gold rings of 18K are around 3-5g, but some very thin rings are below 0.5g. ..